PMID- 16137767 OWN - NLM STAT- MEDLINE DCOM- 20060425 LR - 20151119 IS - 0161-5890 (Print) IS - 0161-5890 (Linking) VI - 43 IP - 9 DP - 2006 Mar TI - The colony-stimulating factor-1 receptor is a specific marker of macrophages from the bony fish gilthead seabream. PG - 1418-23 AB - We report the molecular cloning of the colony-stimulating factor-1 receptor gene from the bony fish gilthead seabream (sbCSF-1R). The deduced sbCSF-1R shows a predicted signal sequence, a transmembrane domain and a tyrosine kinase domain, all in conserved positions. A transcript showing a premature stop codon that predicted the removal of 84 C-terminal amino acids was also found. RT-PCR expression studies demonstrate that, although the sbCSF-1R transcripts are found in different immune tissues, including gill, liver, spleen, blood, peritoneal exudate, thymus and head-kidney (HK), their expression is confined to the monocyte/macrophage lineage. Furthermore, the expression of sbCSF-1R might be modulated by the activation stage of the macrophages, since both the infection of fish and the in vitro activation of leukocytes resulted in the down-regulation of gene expression. These data indicate that the CSF-1R may be used as a specific probe for cells of the monocyte/macrophage lineage in the gilthead seabream, an immunological tractable fish model. In addition, the functional characterisation of the CSF-1R and its ligand may shed light into the mechanisms of proliferation and the pathways of differentiation of macrophages in bony fish. FAU - Roca, Francisco J AU - Roca FJ AD - Department of Cell Biology, Faculty of Biology, University of Murcia, 30100 Murcia, Spain. FAU - Sepulcre, M A Pilar AU - Sepulcre MA FAU - Lopez-Castejon, Gloria AU - Lopez-Castejon G FAU - Meseguer, Jose AU - Meseguer J FAU - Mulero, Victoriano AU - Mulero V LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20050830 PL - England TA - Mol Immunol JT - Molecular immunology JID - 7905289 RN - 0 (Biomarkers) RN - 0 (DNA, Complementary) RN - 0 (Fish Proteins) RN - EC 2.7.10.1 (Receptor, Macrophage Colony-Stimulating Factor) SB - IM MH - Amino Acid Sequence MH - Animals MH - Base Sequence MH - Biomarkers MH - Cloning, Molecular MH - DNA, Complementary/genetics MH - Fish Proteins/*genetics/immunology MH - Gene Expression MH - Leukocytes/immunology MH - Macrophages/*immunology MH - Molecular Sequence Data MH - Phylogeny MH - Receptor, Macrophage Colony-Stimulating Factor/*genetics/immunology MH - Sea Bream/*genetics/*immunology MH - Sequence Homology, Amino Acid MH - Sequence Homology, Nucleic Acid EDAT- 2005/09/03 09:00 MHDA- 2006/04/28 09:00 CRDT- 2005/09/03 09:00 PHST- 2005/01/18 00:00 [received] PHST- 2005/09/03 09:00 [pubmed] PHST- 2006/04/28 09:00 [medline] PHST- 2005/09/03 09:00 [entrez] AID - S0161-5890(05)00307-X [pii] AID - 10.1016/j.molimm.2005.07.028 [doi] PST - ppublish SO - Mol Immunol. 2006 Mar;43(9):1418-23. doi: 10.1016/j.molimm.2005.07.028. Epub 2005 Aug 30.